Comtech EF Data CPLINK - Manual (Page 13)

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8. LNA Configuration
Main Menu > Configuration > LNA (Ref. Fig. 8)
XCVR#
XCVR1 (transceiver #1 select)
XCVR2 (transceiver
#2 select)
ONLINE/OFFLINE status field:
(Status only). Displays the line status of the currently selected XCVR.
Current Source: (Enabled/Disabled) The XCVR has the circuitry to source up to
400 mA of current at 12 VDC to power a LNA. The user can turn this current source
ON/OFF. Care should be taken when directly connecting the XCVR to lab test
equipment: a DC block should be used between the "RF IN" port and the RF test source
to protect the test equipment in case the source is accidentally turned on.
Fault Logic: (On/Off) The XCVR allows the user to select whether or not the
summary fault relay is activated if the LNA current moves out of the prescribed window.
This allows the user to control whether or not the redundancy controller will switch on a
LNA current alarm in the redundant configuration.
Current Window: (Enabled/Disabled)
The XCVR provides the capability to monitor
the LNA current when configured to supply
current to the LNA. In addition, an adjustable
window detect for the LNA current is
provided. After attaching the LNA and
turning on the current source, the user can
"Calibrate" the current and set a window from
+/- 20% to +/-50% to trigger an alarm. The
user can disable the "window detect" feature
by setting the window value to +/- 99%.
Allowable Change: +/- 20% to +/- 50%. See
the documentation in the Current Window
above.
(Return) button – returns the user back to the Main Menu and will NOT program any
programmable parameters.
(Update) button – will program the Palm
 device with any parameters that have
changed since the menu was displayed or the last time the (Update) button was pressed.
Fig. 8